Statistical properties of folding sequences of two-dimensional compact protein were investigated by using the enumeration calculation method．The number of folding sequences SN

may be expressed as SN∝ 2N．Here 2N means the total number of sequences for N-monomer compact chains．For folding sequences

HH/NP≈1.197

here NH and NP represent the total number of hydmphobie(H) and hydrophilie (P) groups in all folding sequences． Comparisons with real proteins were also made．Distributions of folding sequences in all sequences according to the number of hydmphobie amino acid residues Were investigated

and they had the form of the Ganssion distribution．The cluster size and its distributions were also studied

and there existed a difference between folding sequences and random sequences．The coil-to-globule transition temperature Tc

estimated from the location of the peak on the heat capacity

depended on the chain length and was almost sequence independent．